Automatic slotting machine



AUTOMATI C SLOTTING MACHINE Filed Sept. 17, 1945 5 Sheets-Sheet 1 I 94 I M v IN VENT OR.

l izmilfl 5611117662.

ATTORNEY.

June 24, 1947. E. A. SCHIGUT AUTOMATIC SLOTTING MACHINE Filed Sept. 17, 1945 4 To FOOT PEDAL :5 Sheets-Sheet 2.

INVENT OR.

14.5 hi uZ M June 24, 1947. E. A. SCHIGUT AUTOMATIC SLOITING MACHINE Fild Sept. 17, 1945 3 Sheets-Sheet 5 INV ENT OR.

Z all BY 2m @M True/v5 Patented June 24, 1947 UNITED STATES PATENT OFFICE AUTOMATIC SLOTTING MACHINE Emil A. Schigut, Van Nuys Calif.

Application September 17, 1943, Serial No. 502,741

15 Claims.

My invention relates to an automatic slotting machine and more particularly to a machine for automatically making bayonet and other slots in fastener elements.

An object of the invention is to provide work feeding means and cutting means that arerelatively movable one with respect to the other, to produce substantially spiral grooves, recesses or slots in fastener elements.

Still another object of the invention is to provide means for rotating workand by means of the rotation thereof to effect forward feeding of same, whereby tosubstantially spirally feed the work with respect to a cutting means.

My invention also has for its objects to provide such means that are positive in operation, convenient in use, easily installed in a working position and easily disconnected therefrom, economical of manufacture, relatively simple, and of general superiority and serviceability.

The invention also comprises novel details of construction and novel combinations and arrangements of parts, which will more fully appear in the course of the following description. However, the drawings merely show and the following description merelydescribes one embodiment of the present invention, which is given by way of illustration or example only.

In the drawings, like reference characters designate similar parts in the several views.

Fig. 1 is a plan view of a multiple machine embodying the foregoing objects.

Fig. 2 is a side elevation, partly broken of said embodiment.

Fig. 3 is a horizontal plan view principally of clutch mechanism comprised. in the embodiment.

Fig. 4 is a vertical section taken on the line 4-4 of Fig. 3.

Fig. 5 is a diagrammatic view of connections comprised in the invention.

Fig. 6 is an enlarged, broken, sectional view of a feeding chuckcomprised in said 'embodi.

ment.

Fig. 7 is a horizontal, sectional view of the mechanism shown inFig. 6.

Fig. 3 is a face view of a product of the present machine, with cutting means arranged'diagrammatically opposite same.

Fig. 9 is a face view taken, substantially at right angles to Fig. 8.

Fig. 10 is an end view of saidproduct of the present machine. p 1

Fig. 11 is a brokenrdiagrammatic view .offla away,

valve comprised in the embodiment, in a different ra i e .pos i etaken therefrom a needed. It is to be understood that the machine shown in the drawings is a multiple machine having four distinct operating mechanisms. To drive these four mechanisms, twin shafts l6 and I1 are driven by the motor I5 through the intermediary of belts l8 and 19' and sheaves 20 and 2| on the shafts l6 and I1 respectively. The shaft I6 is mounted in bearings 22, 23 and 24 in the frame of the machine, while shaft'l'l is mounted in bearings 25, 23 and 21 mounted'in parallel relation with the first mentioned bearings. The bearings 24 and 21 are arranged upon a bracket frame 23 extending horizontally and laterally from the main table support, "as perhaps best shown in Fig. 3.

Suitable clutch means 23 and 30 are arranged to connect the shafts l6 and I1 respectively to crown clutch members 3| and 32 on the sheaves 20 and 2! respectively. Levers 33 and 34 are pivotally mounted on arms 35 and 36 on the bracket frame 28. The levers 33 and 34 are operated by suitable pedals (not shown), through the intermediary of connecting rods 31 and 38, respectively.

, The pump 33 is mounted on the frame under the top l2. A three-way, manual valve 40, a fluid motor 4| and a reservoir 42 are arranged in series in a fluid circuit, with the pump 39. A cam 43 on the shaft l1 engages a roller 44 on piston rod 45 of a piston 46 in the pump 39.

A piston 41 in the fluid motor 4| drive piston rod 48 to which is connected a rack 49, by

means of a crosshead 50. Pinion 5| is driven by the rack 49. A return spring 52 acts upon the rack 49 to return the rack 49 and piston 4! to the left in Fig. 5,'when fluid pressure in the fluid motor 4| permits same.

The fluid circuit on the power stroke is as follows: Reservoir 42, conduit 53, pump 39, conduit 54, three-way valve 40, conduit 55, fluid motor 4|. When the piston 41 uncovers the port 56 leading to a bleeding line 51, then the flow is through the conduit 51 back into the reservoir The mo tor I5 operates continuously and the power is Y 3 42, without further motion being imparted to the piston 41.

The fluid circuit on the return stroke is as follows: To effect a return stroke, the three-way valve 43 is manually turned to the position shown 5 in Fig. 11. Then the flow is from the fluid motor lI through conduit 55 through three-way valve it, through conduit as, through conduit 51 to the reservoir 42 and through conduit 53 to the pump 39. Fluid movement through conduita satispree e vented when the valve 49 is'in the-position-shown" in Fig. 11. A check valve 539 prevents retrograde movement of liquid back into the pump 39 from conduit 54, while check valve 60 preventsiretromrgrade movement of liquid from the pump 39 back into the conduit 53.

Mounted within the pinion.=l5I. -t,is aaehuckhtIim-s provided with a bayonet arranged groove 62."A' collet 63 (split longitudinally along the botto-Imu as shown in Fig. 6, to make it resilient) is arranged "concentrically-l within; the uEhuCk m6 In A sleeve 'fi his interposed; (between? the: achuckebody andathe cQlletaES-EWA work: centering toohfiEms a mounted avithinizthe loolletaflm: Theuendwof': the. a tool: ,6 5rhasi'a SCIGWZdFiYGIC -head :16 6- :t-ha-t zene es a slotzIBIiina flange t'l ofvtheiworkmi.

The inner endwt-the colletwfiiiehasaa threaded connection. withia roda68nthat1-is slidable a m; a screwhapo-EQ on .-the-;-a"eanaend ."of Y the"sleeve 541 A coiled ,'springa I0 intenposedebetweeneanrebut- BI! mentis'l Lon-therod-=-68 andtthecap@Sptensionsee thelg'riplof; the-rcollet-63.'nponrtheiflange fi'lxof the rr" W01 k,. .by meanssof -.the ,engaging- ,taperingshoul -l dersof the colletfi tandithe. sleeve tte.aTheoutena-a rear.,end-rof the :rod 68 has-ta hand-1e; J2 pivotallye connectedwthereto," lat AI 0 The; handle-:12 -:has, a; cam: 13--:.In.the fulL line @osit-ion-of theihandle :12 a in Fig ,..the camriliirmoves ther-abutmentfii towandathecap. 69'; thus,odrawing-the colleteliii t ht aroundlthe fiangefi I. of the-:workc .Tof'release A" the.rwork,'rth!handlef,l2 ismovedptothe-broken line sposition the'reby movingethe cam-J3 awayl-la from thabutmentJ I permitting... the rod..68 1t0-.,: moveto'vth'e firightliin 6, itherebyflv releasing.-t the" pressure. of .the" collet. .63 uponthemorklie.

A housing 14'supports'a guide I5for the rackaa, 49 and rotatably. supports thesleeve.. 64,.chuck; C'C 'H LBT 311 01 '55I;"t,h".'.work,j'.the pinionjI; the rod (68 fandgc apv GBIZth'e' handle] Land. the, spring'tfii suitame' ball bearings. 16 areprovided for thismotary. supportlj entirehassembl y... witl'r'in andg'upomthe housing 1473's slid'abl'el .to the rightand 'left'jn ,6 I "A dependifig idl; 'I'I under'the housing 15' s'lid'ahlyl engages. a. guide Q gr0ove'T8." A rearward stop l9""isprovideiior-..,. the housing '54. A plate lIa .is securedlhetweent. each pair of housingslfidjon which motor 4 I "is. mounted, wherebyithehousingsand.themotortare sliclabl@Jtoitslardlyiandbackwardlynassseentinflig.x 6O 1 Fixed meal-mes 8 0C are prnvid-ed Aoppositeueacha; other, substahtiallylat rightlangles .to eachtworks. holder: Bushingsm Ij. arelprovided in the zbearringsj "for, reciprocating bars -.82. -..-.Cutting:,.toolsl are alsci'..pr.ovided.,-= 5' They: may-v be. any qsuitable cuttingmeanm Reciprocating-:punches A13 eare shownas ,suitableexamples. .-They aresprevided with 'heads 84, which'headsaare; held',='bet.ween threadedconnections v .of .:the reciprpcatingzbarsij' 70 82 andicapsA56.mInothers-words the rodsf areflnezz" serted'..through the central boresei-n'atielecaps flfi withethe,beveledtheadsflu of ther-punchesrresting tr. against,,.similarly- ,shaped-i .shouldersrewi-thin Ithem:

caps sfitpv-Thenstheicapstafirare screwed uponi'thexl projecting, threaded bosses 85 on the reciprocating bars 82.

One of each pair of bearings 80 contains a stationary guide pin 81, which engages with the bayonet slot 62. By this means the chuck 6| is fed forward as it is rotated, whereby the chuck travels spirally.

The reciprocating bars 82 have pins 88 engaging inclined slots 89, 90 and 9| in vertically reciprocatin'g'arrmsi9z g-jis3 andfldlfsi Stationary guides an'd*'96"aid in 'di-rectin'g vertical 'inovement of the arms 92 and 94. Eccentrics 91 have connecting i-ods 98 that are pivotally connected with the reoiprocating arms 92, 93 and 94 by means of pivot pins 99. The eccentrics 91 are driven by camswfliuen the shafts I6 and I1. Reciprocation of -the arms 92,:93and 94 causes the punches 'or cutting tools 83"to reciprocate with respect to thenworklflil. The arms are timed so that the punches or cutting tools strike the work simultaneously-at: diametrically? opposite points-.1- This? action laidsdn maintaliningitheeworlerin itse-cen-uitered position: a;

Knobs I02 are provided on thetqendsnofmthem racksefi to'provide manual-means:forraetractingi. the track win case; (then machine tstopsewith '-:-the. punches in the -.-work.-W.It .is also.-to be funderstoodw thathand.wheels,- (not shown):.maytbeMprovided-w. on the shafts I! to rotate-ethemr. in .-case":they:;y

stopgatdead center-t.

Central: plates I I 2- onsthe platenIA separate. 13116.222 work spalie: into .-ztwo;parts.--. .Between' zthe. i-platesexs I I 2-isa space:IIai-fortwaste.material. :1

In the operation-of the;device;stheeblankmorlcei will I his arranged -;manua-l-ly itheflchuckrfi, ewithoi the lfilangeae'li of theiwo-rk withinuthe resilientgrip of theiecolletp63iandalwith therhead-vfili fengagln the... slot ,IBSeof the work; ;-;,'I"he?handle: 1:2 is then' moved f romwthe unlocked, brokenzlinelpositioneto't2; .the full liner-positioneof- Fig: Gythusulockingsthe. wor-k-in place. :Thehousingzlll:isjithereuponimovedl: forwardrmanuailyc-nnttl'stheepim 81 eengagessthe: slot62; -:.The f:ootvfpe;dal notzshowiricis thenzactu ated to iconnect theinrotating: motors with 2th shafts t6 and-xI 'I= Thercams use on hezshaftsmausesreciprocatic of thefeccentrifcs sandainiunniireciproeatecth arms 92, 93 andnM hinh inturmreciprncate the bars: 82, etherehyrcausingemeciprocatingnoperation "of the punches cuttingitools 835331'Ass1ih6fiw0111g12h I 0 his rotatedzbyzbhezfluidzlcircult shoWmin Fi'g. '5; the pin 8'! and slotrnr ogrouve i'fiEfifEectsIia-tor wards'spirairnioyementi tootherichuek iand -wor lc' tv The work was previously bored endwise at tlllf Disengagingrethe'ieclntch; meansz permits the springl52hrtouretnrmztthaefluitl motor 4I o its' w nal positiongnvhiclrretracts th chuekfi I and the work IIII. The finished product is then ire leasedahyunovingzthefihandleli'i ifiom th full lirie position to the broken linenposition of" Fig Theufiinshemp roducteisithen removed by hand."

Wliiiefr-I haven illustrated and deseribed what I now regard as the preferred embodiment of my invention; thel construction isg of course, subjet to modifications without departing irommhspiriV andi scospeiof-izmyi inventions .-*:-I, therefore; do not wisl-mto'zrestrictumyselfto th particular form ofw construction illustrated and-describech'but desire to availnnyselfi?ofall modifihatiohs that ma'y'ffail 5' within the scope of the appended claim'sw Having thu's deseribed my invention,what= I claim and desire to secure by lettered?atentusff 1. l'Inoa machine of th'e eharacter described," a workr lfeeding chuck having a master-"bayonet groove therein, said chuck having-a grooved"col=- let-for the flange of a blank, a relatively'fixed guide engaging the groove, motor actuated driving means connected to rotate the chuck continuously, the engaging guide and slot being arranged to feed the chuck forward, following the contour of the master groove, when the chuck is rotated by the driving means, and a percussion tool disposed to punch the work continuously as the chuck is rotatively fed forward uninterruptedly generally in a spiral path, punching into the blank a slot following the contour of the master groove. 1 I

2. In a machine of the character described, a work feeding chuck having a master groove thereinya relatively fixed guide engaging the groove, a pinion connected to rotate the chuck about the axis of the chuck, a rack connected to drive the pinion, a fluid motor operatively connected with the rack, a closed fluid circuit for the motor, fluid pump means in the circuit means to drive the fluid pump, supplying pressure fluid to the motor, means to automatically relieve the fluid motor when it has reached its maximum driving position, the engaging guide and slot bein arranged to feed the chuck forward following the contour of the master groove when the chuck is rotated by the driving means, and a cutting tool disposed to cut into the workas the chuck is rotatively fed forward generally in a spiral path, cutting into the blank in a path following the contour of the master groove.

3. In a machine of the character described, a framework, 2. chuck mounted for rotary movement upon the framework and arranged to slide simultaneously with respect thereto, reciprocable fluid pressure actuated driving means connected to rotate the chuck and being slidable therewith, releasable means on the chuck disposed to grip a flange of work material, the chuck and a relatively stationary part of the framework having an engaging groove and pin arranged to effect forward sliding movement of the chuck by its rotary movement, and cutting means arranged to remove material from the work in a pattern following said groove.

4. In a machine for slotting hollow work material, percussion punch means disposed to reciprocate along a fixed longitudinal axis, rotary work holding means mounted to have a reciproeating motion, reciprocable fluid pressure actuated means to rotate the work holder and being slidable therewith, the work holder and a relatively stationary part of the machine having a substantially spiral groove and pin means engaging each other, the pin and groove being inclined to feed the work holder forward by rotation thereof, and means to reciprocate the percussion punch means to and fro along said axis, the punch means punching a slot in the work material following the pattern of the spiral groove and continuously as the work material is moved forward.

5. In a machine for slotting hollow work material, oppositely disposed percussion punching means mounted to reciprocate longitudinally toward and away from each other, driving means for continuously reciprocating the punching means to cause same to slot the work material, rotary work holding means mounted to have a reciprocating motion, means to rotate the work holder, the work holder and a relatively stationary part of the machine having engaging inclined groove and pin means, the incline of the groove being arranged to feed the work holder forward'between the opposite punching means and during the punching operation.

6. In a machine for slotting hollow work material, oppositely disposed percussion punching means mounted to operate longitudinally toward and away from the work material, driving means connected continuously to operate the punching means toslot the material, and means to feed work continuously between and simultaneously with the oppositely operating cutting means, to slot'the work simultaneously from opposite sides continuously during the feeding of the work and to maintain the work centered between the cutting means. 7

7. In a machine for slotting hollow work ma terial, diametrically oppositely disposed punches mounted to reciprocate longitudinally toward and away from each other, driving means connected to reciprocate the punches toward and away from each other substantially simultaneously, rotary work holding means having resilient gripping means for the work, the work holding means being mounted to reciprocate and connected to feed the work to a centered position between the oppositely operating punches, the resilient mounting releasably holding the work, means to rotate the work holder, the Work holder and a relatively stationary part of the machine having a substantially spiral groove and pin means engaging each other, the pin and groove being inclined to feed the work holder forward by rotation thereof.

8. In a machine for slotting hollow work material, a frame, a chuck assembly reciprocably mounted on said frame, a plurality of work holding chucks rotatably mounted on said assembly, said chucks each having a pinion to effect rotation thereof, a rack member adapted to actuate said pinions, a fluid motor on said assembly adapted to actuate said rack, flexible power supply means connected to said motor and. said frame and having control means independent of said assembly, a plurality of punch means disposed to reciprocate along a longitudinal axis in mutual spaced relation, whereby to punch a pair of elongated slots in diametrical portions of the work when said assembly is reciprocated to advance the work between said punch means.

9. In a machine for slotting hollow work material, a frame, a chuck assembly reciprocably mounted on said frame, a plurality of work holding chucks rotatably mounted on said assembly, said chucks each having a pinion to effect rotation thereof, a rack member adapted to actuate said pinions, a fluid motor on said assembly adapted to actuate said rack, flexible power supply means connected to said motor and said frame and having control means independent of said assembly, a plurality of punch means disposed to reciprocate along a longitudinal axis in mutual spaced relation, whereby to punch a pair of elongated slots in diametrical portions of the work when said assembly is reciprocated to advance the work between said punch means, and means to actuate said punch means.

10. In a machine for slotting hollow work material, a frame, a chuck assembly reciprocably mounted on said frame, a plurality of work holding chucks rotatably mounted on said assembly, said chucks each having a pinion to effect rotation thereof, a rack member adapted to actuate said pinions, a fluid motor on said assembly adapted to actuate said rack, flexible power supply means connected to said motor and said frame and having control means independent of said assembly, a plurality of punch means disageaascs:

posedz torecipmcate; along aelongitudinal axis.

mutual spaced relation; w-hereby'tospunchz agpain ofielongatedsslots. irndiametrical...p.ontions of the work; when said; 'zassembly is; reciprocated to; ad V3;IIOB= the; work; betweenpsai'dspunch; means; and;

meanspto: actuate: said punch means; last: means comprisingebar members reciprocable at right :am-

glee; to; said. punch; means. and; haying angular slotted: engagement: therewith; a. rotary; power shaft fonsaidxbarzy members, .andieczcentric; crank:

meansiconnectedhetween saidishait andasaid; bar members;

11.- In:. a: machine, for;slettingihcllowawozflnmaa terial, percussion punching tools mountedcto-reciprocate longitudinally towardandaway: from opposite.- sides? of. the Work material means .con-v form slots; therein; andxmeans to; advance; the work. material .continuously:in:a spiral :pathduning the; continuous reciprocation of saidtpnnche 115127117001;

12;: In amachineior:slettinghollow:Workimas teri-ahnercnssion punching toolsxmountedrto re.- ciprocate; substantially at; right:v angles toe. the, longitudinal; axis and on. opposite, sides of .1 said work: material,- meanse continuously: to reciprocate saidi punching tool continuously to remove part -tinuonslyi to reciprocate. said. :punching;tonl-;con:- timlonsly; towremoJ/e: vpart; ofitheworkzmaterialto:

of: the; WOIKF material; to. I form slots therein, and

means t0;v feed;; the: WOlE'k. 1 material continuously forward. during; the; slot; punching: operation;

13; In. a: machine-forslotting .hollow;work meteria-l, a: Work holder, percussion tools mounted.

to reciprocate: substantially :at righttangles to the.

longitudinal axis and on opposite sides ofsaid;

work material, means .to: reciprocate saidztools; continuously to-removezpart otthe material lfrom thQWQlfk: to. form; slots; therein; yielding. means...

continuously 1 to; rotate. said: Work: holder ;and:s1id ablertherewith; and; means to: feed. the workman terialforward continuously during. the continuous operationofthe punchingtool.

14:. In a machine of; the character: referred '.to',

83 Wcrlnhclding; means;.percussiomtooh; forrremov L ingmarttaotther worlnmaterial;fromxonposite sides the-reef: ta. term: slotsz'. therein, and: reciprocable; transversely: of; the-Work; mechanism 101 yield-- 5; inely feedinarthewont;noidineam ansiforwandlya EMIL A SGHIGUTI I BEEERENGES CITED The followin referencesarev of. record in the.

file. .oifi this patent UNITED- STATES PATENTS:

Number Name Date 1,445,893 Lutz Feb, 20, 1923 2,109,969 Dzus Mar. 1; 1938 286,150 Richards Oct. 2; 1883 974,115}? Hanson Oct; 25", 1910. 1,-Qet7g285; Pine' Dec. 17, 1912' 20,165. Mackerley May 4, 1858 1;21833829' 'Loesser Nov. 5; 1918. 236859651 Boyce Feb; 6,; 1945 FOREIGN PATENTS" Number Country Date 122,932 Great Brita-in" Feb. 13, 1919,. 74 479. Germany: .Apr.- 11, 1894:

280,475 Germany Nov. 16, 1914 

